/*
**************************************************************************************
*Myriad Engine                                                                       *
*Copyright (C) 2006-2007, 5d Studios (www.5d-Studios.com)                            *
*                                                                                    *
*This library is free software; you can redistribute it and/or                       *
*modify it under the terms of the GNU Lesser General Public                          *
*License as published by the Free Software Foundation; either                        *
*version 2.1 of the License, or (at your option) any later version.                  *
*                                                                                    *
*This library is distributed in the hope that it will be useful,                     *
*but WITHOUT ANY WARRANTY; without even the implied warranty of                      *
*MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU                   *
*Lesser General Public License for more details.                                     *
*                                                                                    *
*You should have received a copy of the GNU Lesser General Public                    *
*License along with this library; if not, write to the Free Software                 *
*Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA      *
**************************************************************************************
*/
package leola.backend.interpreter;


/**
 * The virtual machine
 * 
 * @author Tony
 *
 */
public class VM {

	/**
	 * Call stack
	 */
	private Callstack callstack;
	
	/**
	 * Symbol stack
	 */
	private SymbolStack symstack;
	
	/**
	 */
	public VM() {
		this.callstack = new Callstack();
		this.symstack = new SymbolStack();
	}

	/**
	 * @return the callstack
	 */
	public Callstack getCallstack() {
		return callstack;
	}

	/**
	 * @return the symstack
	 */
	public SymbolStack getSymstack() {
		return symstack;
	}
	
	/**
	 * Does a shallow copy
	 * @return a shallow copy
	 */
	public VM shallowClone() {
		VM cloned = new VM();
		cloned.symstack = this.symstack.shallowClone();
		return cloned;
	}
}
